Undaravari Baisoni is a Ganpati aarti signed "Das" — the Samarth Ramdas tradition — whose third verse recounts the moon (Chandra) being cursed on Pradosh day, which is why it is sung especially on Sankashti Chaturthi.
Composer: "Das" (the Samarth Ramdas tradition).
When to sing it: The daily Ganpati aarti; especially on Sankashti Chaturthi, since the third verse recounts the Pradosh/moon-curse episode.
Meaning (brief): O Ganaraya, you come running upon a mouse, holding modak-laddus in your hand, and rush to your devotees' aid in distress. In the month of Bhadrapad you appear in your innocent form, wearing garlands of red flowers, a musk tilak on your forehead, looking beautifully dark-complexioned. The third verse recounts, as the original text has it, the moon being cursed on Pradosh day. The devotee finally implores Parvati's son, Gananatha, to grant him wisdom.
The words and tune can vary slightly by household or sect. This text follows a traditional household Aarti Sangrah booklet.